System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Thread Size Thread Size | Hide |
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Material Material |
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Hex Nut Profile Hex Nut Profile |
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| Standard | Thin |
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| Extra-Wide Thin |
Thread Direction Thread Direction |
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 | Right Hand |
Thread Spacing Thread Spacing |
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Thread Type Thread Type |
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Drive Style Drive Style |
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 | External Hex |
Locking Type Locking Type |
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 | Nylon Insert |
Insert Maximum Temperature Insert Maximum Temperature |
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Finish Finish |
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Connection Style Connection Style |
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| Flared |
Type Type |
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 | Nut |
Connection Type Connection Type |
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 | Tube |
Dash Size Dash Size |
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For Tube Material For Tube Material |
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How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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About Nuts, Materials, and Finishes
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Low-Strength Steel Hex Nuts
About half the strength of medium-strength steel nuts, these nuts are for light duty fastening applications, such as securing access panels.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Steel—Grade 2 | ||||||
|---|---|---|---|---|---|---|
| 2 1/2"-12 | 3 3/4" | 2 5/32" | ASTM A307 | 1 | 000000000 | 000000 |
Low-Strength Steel Thin Hex Nuts
Also known as jam nuts, these are about half the height of standard hex nuts. Use them in low-clearance applications or jam one against another nut to hold it in place. About half the strength of medium-strength steel thin nuts, use them for light duty fastening applications, such as securing access panels.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Steel—Grade 2 | |||||
|---|---|---|---|---|---|
| 2 1/2"-12 | 3 3/4" | 1 13/32" | 1 | 000000000 | 000000 |
High-Strength Steel Extra-Wide
Thin Nylon-Insert Locknuts
About half the height and 10% wider than standard nylon-insert locknuts, use these in low-clearance applications or jam one against an extra-wide hex nut to hold it in place. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use. Comparable in strength to Grade 8 bolts, these locknuts are about three times stronger than low-strength steel extra-wide thin locknuts.
Black-phosphate steel locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Insert Max. Temp., °F | Each | |
Black-Phosphate Steel—Grade C | |||||
|---|---|---|---|---|---|
| 2 1/2"-12 | 4" | 2 3/16" | 250° | 000000000 | 000000 |
Nuts for 37° Flared Fittings for Stainless Steel Tubing
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
- Tubing: Use with seamless or welded 304 or 316 stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
- Specifications Met: ISO 8434, SAE J514
Use these nuts with a sleeve and fitting to provide a tight metal-to-metal seal on stainless steel tubing that is flared to 37°. Nuts are 316 stainless steel for excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | Nut Material | Each | |
| 2" | 316 Stainless Steel | 000000000 | 0000000 |
Nuts for Precision AN 37° Flared
Fittings for Stainless Steel Tubing
- For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil, Water
- Temperature Range: -320° to 1200° F
- Tubing: Use with seamless 304 or 316 stainless steel
- Specifications Met: See Table
Use these nuts with precision AN sleeves and fittings to provide a tight metal-to-metal seal on stainless steel tubing that is flared to 37°. The threads are Class 3B and adhere to tighter tolerances than other nuts. They are made to exact AS (formerly AN) specifications.
304 stainless steel nuts have very good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
304 Stainless Steel | ||||
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| For Tube OD | Max. Pressure | Specifications Met | Each | |
| 2" | 1,500 psi @ 72° F | AN818-32J, ASTM A380, SAE AS4841 | 00000000 | 0000000 |
Nuts for 37° Flared Fittings for Steel Tubing
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temp. Range: -60° to 400° F
- Tubing: Use with seamless steel
- Specifications Met: JIC, SAE J514
Use these nuts with a sleeve and fitting to provide a tight metal-to-metal seal on steel tubing that is flared to 37°. They are zinc-plated steel for fair corrosion resistance.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | Nut Material | Max. Pressure | Each | |
| 2" | Zinc-Plated Steel | 1,100 psi @ 72° F | 00000000 | 000000 |